It is because you still have IONVMeFamily.kext present.
As per patch-nvme README, you must delete IONVMeFamily.kext if you're not using the class-code spoof.
Suggest you read carefully.
Hello, I tried to delete IONVMeFamilty.kext but I can't because the filesystem is read-only. I tried to remount it as read-write but it won't remount or umount probably because it is the root filesystem. So how can I still delete it ?